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Air compressors are the core equipment in nitrogen and oxygen production stations, providing a stable, clean compressed air source for the gas separation system.
Oxygen & Nitrogen
Air compressors are the core equipment in nitrogen and oxygen production stations, providing a stable, clean compressed air source for the gas separation system. Their performance directly impacts nitrogen and oxygen production efficiency and gas purity. Specific applications are as follows:
I. Nitrogen Production Station: Supporting Nitrogen Separation and Purification
Providing Feed Gas: Air compressors compress atmospheric air to 0.7-1.0 MPa, which serves as feedstock for pressure swing adsorption (PSA) or cryogenic separation nitrogen production. In PSA nitrogen production, compressed air enters an adsorption tower, where it passes through a carbon molecular sieve, adsorbing impurities such as oxygen and carbon dioxide, producing nitrogen with a purity of 95%-99.999%. The stability of the compressor's output airflow (pressure fluctuation ≤ ±0.02 MPa) reduces the need for frequent tower regeneration and extends the life of the molecular sieve by over 30%.
Adaptable to different scale requirements: Small nitrogen production stations (5-50 m³/h) are equipped with screw compressors for applications such as laboratories and food preservation. Large-scale industrial nitrogen production stations (500-5000 m³/h) utilize centrifugal compressors, which provide a high-flow gas source through multi-stage compression and are suitable for continuous production in chemical and metallurgical industries.
II. Oxygen Production Station: Ensuring Efficient Oxygen Production
Drive Separation System: In PSA oxygen production, an air compressor compresses air to 0.5-0.8 MPa and feeds it into an adsorption tower filled with zeolite molecular sieves. The molecular sieves preferentially adsorb nitrogen, producing oxygen with a purity of 90%-95%. In cryogenic oxygen production, compressed air is cooled and liquefied, and then separated into high-purity oxygen (above 99.5%) through distillation. The air compressor requires a stable high-pressure gas source (0.6-1.2 MPa) to ensure the continuity of the liquefaction and distillation processes.
Meeting Medical and Industrial Standards: Medical oxygen production stations require extremely high air source cleanliness. Air compressors must be equipped with multi-stage filtration (oil removal, dust removal, and sterilization) and drying equipment to ensure that the compressed air has an oil content of ≤0.01ppm and a dew point of ≤-40°C, thereby preventing oxygen contamination that could impact medical safety. Industrial oxygen production (such as in steelmaking) prioritizes high air compressor flow output. A single centrifugal air compressor can produce thousands of cubic meters of oxygen per hour.
Core Function and Compatibility
Stability is key: The stability of the compressor's output pressure and flow directly determines gas purity. For example, in PSA nitrogen production, a pressure fluctuation exceeding 0.05MPa can result in a 2%-5% drop in nitrogen purity. Therefore, a gas storage tank and pressure control system are essential.
Energy Saving and Adaptability: Variable-frequency air compressors can adjust their output based on the nitrogen/oxygen production load, saving 15%-25% energy compared to fixed-frequency models. Furthermore, for high-altitude oxygen stations, air compressors must be adaptable to high altitude conditions, ensuring they can still achieve their rated airflow capacity even in low-pressure environments.
In short, air compressors provide the "source of power" for nitrogen and oxygen production stations. Their efficient and stable compressed air supply is crucial for achieving low-cost, high-purity gas separation.
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